Dvorak, Karen <br/><br/>
Labor requirement in assessment of technologies 
/ Karen Dvorak 
. - Ibadan  : International Institute of Tropical Agriculture, 1991
. - 10 p.  : couv. ill.  ; 30 cm. 
 - IITA research guide  27 .
<br/><br/>Bibliogr. 
<br/><br/><label>Source: </label> Don 
<br/><br/><label>Universal Decimal Class. No.: </label>631.51